File(s) under permanent embargo
Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
journal contribution
posted on 2023-05-16, 23:57 authored by Albrow, MD, Horne, K, Bramich, DM, Fouque, P, Miller, VR, Jean-Philippe BeaulieuJean-Philippe Beaulieu, Coutures, C, Menzies, J, Williams, A, Batista, V, Bennett, DP, Brilliant, S, Cassan, A, Dieters, S, Dominis Prester, D, Donatowicz, J, Greenhill, JG, Kains, N, Kane, SR, Kubas, D, Marquette, JB, Pollard, KR, Sahu, KC, Tsapras, Y, Wambsganss, J, Zub, MThe numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source-star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.
History
Publication title
Monthly Notices of the Royal Astronomical SocietyVolume
397Issue
4Pagination
2099-2105ISSN
0035-8711Department/School
School of Natural SciencesPublisher
Wiley-Blackwell Publishing IncPlace of publication
Malden, USARights statement
The definitive published version is available online at: http://interscience.wiley.comRepository Status
- Restricted